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Java Platform 1.2
Beta 4

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Class java.util.zip.GZIPInputStream

java.lang.Object
  |
  +--java.io.InputStream
        |
        +--java.io.FilterInputStream
              |
              +--java.util.zip.InflaterInputStream
                    |
                    +--java.util.zip.GZIPInputStream

public class GZIPInputStream

extends InflaterInputStream

This class implements a stream filter for reading compressed data in the GZIP format.

See Also:

InflaterInputStream

Field Summary

protected CRC32	crc CRC-32 for uncompressed data.
protected boolean	eos Indicates end of input stream.
static int	GZIP_MAGIC GZIP header magic number.

Fields inherited from class java.util.zip.InflaterInputStream

buf , inf , len

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

GZIPInputStream(InputStream in, int size)
Creates a new input stream with the specified buffer size.

GZIPInputStream(InputStream in)
Creates a new input stream with a default buffer size.

Method Summary

void	close() Closes the input stream.
int	read(byte[] buf, int off, int len) Reads uncompressed data into an array of bytes.

Methods inherited from class java.util.zip.InflaterInputStream

fill , read , skip

Methods inherited from class java.io.FilterInputStream

available , mark , markSupported , read , reset

Methods inherited from class java.lang.Object

clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait

Field Detail

crc

protected CRC32 crc

CRC-32 for uncompressed data.

eos

protected boolean eos

Indicates end of input stream.

GZIP_MAGIC

public static final int GZIP_MAGIC

GZIP header magic number.

Constructor Detail

GZIPInputStream

public GZIPInputStream(InputStream in,
                       int size)
                throws IOException

Creates a new input stream with the specified buffer size.

Parameters:

in - the input stream

size - the input buffer size

Throws:

IOException - if an I/O error has occurred

GZIPInputStream

public GZIPInputStream(InputStream in)
                throws IOException

Creates a new input stream with a default buffer size.

Parameters:

in - the input stream

Throws:

IOException - if an I/O error has occurred

Method Detail

read

public int read(byte[] buf,
                int off,
                int len)
         throws IOException

Reads uncompressed data into an array of bytes. Blocks until enough input is available for decompression.

Parameters:

buf - the buffer into which the data is read

off - the start offset of the data

len - the maximum number of bytes read

Returns:

the actual number of bytes read, or -1 if the end of the compressed input stream is reached

Throws:

IOException - if an I/O error has occurred or the compressed input data is corrupt

Overrides:

read in class InflaterInputStream

close

public void close()
           throws IOException

Closes the input stream.

Throws:

IOException - if an I/O error has occurred

Overrides:

close in class FilterInputStream